commit df73de9b0d412 ("mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON
is not enabled") introduced fallbacks for APIs, but missed out on adding
the header file. This would work only if linux/err.h is also included
in the source code from where this file is included. It would be better
to include linux/err.h in file to remove possible build errors.
Without this patch, we get following and similar build errors if this
header file is included in some source file and CONFIG_MFD_SYSCON is
not enabled.
include/linux/mfd/syscon.h: In function ‘syscon_node_to_regmap’:
include/linux/mfd/syscon.h:30:2: error: implicit declaration of function
‘ERR_PTR’ [-Werror=implicit-function-declaration]
return ERR_PTR(-ENOSYS);
^
include/linux/mfd/syscon.h:30:18: error: ‘ENOSYS’ undeclared (first use in this
function)
return ERR_PTR(-ENOSYS);
^
Signed-off-by: Tushar Behera <[email protected]>
---
include/linux/mfd/syscon.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
index 8789fa3..75e543b 100644
--- a/include/linux/mfd/syscon.h
+++ b/include/linux/mfd/syscon.h
@@ -15,6 +15,8 @@
#ifndef __LINUX_MFD_SYSCON_H__
#define __LINUX_MFD_SYSCON_H__
+#include <linux/err.h>
+
struct device_node;
#ifdef CONFIG_MFD_SYSCON
--
1.7.9.5
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